Condensation has a habit of forming where it is definitely not expected. One of these unfortunate places can be safely considered the interior space of the car's lighting fixtures. Headlights fogging from the inside is a serious problem that should never be ignored. As soon as this has happened, you need to try to resolve the issue as quickly as possible. Here's what to do in a situation like this.
Fogging headlights from the inside is a fairly common problem among cars, which does not depend on the specific model or brand of car. Most often, condensation in the lighting device forms after visiting the sink. This happens despite the fact that each headlamp has its own drainage and ventilation system. If there is a single case of fogging, then “ventilation” will be enough to solve the problem. Just leave the hood of the car open for 15-25 minutes. However, if condensation occurs constantly, then drastic measures must be taken.
First of all, you should understand what exactly is the fault of this kind. Most often, condensate (in addition to washing) is formed due to the destruction of the sealant layer, violation of the integrity of the case, the appearance of microcracks on the headlamp, and leakage at the wiring connections. Finally, a sure way to regularly fog up is to get clogged vents and headlight drains. The main problem with fogging headlights is that the studied light begins to be refracted. This makes driving less safe and can lead to potential accidents. Finally, such a headlamp can become a hotbed for the development of a corrosive process.
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All problems are eliminated by one of two actions: cleaning or sealing. However, first the headlamp will need to be removed and disassembled, and also thoroughly dried. Next, you should test each of its elements in order to find the problem area (or places). If insulation is broken somewhere, it must be improved with a suitable sealant. In cases where the ventilation is clogged, it will be enough to carry out the most common cleaning. At the very end, the headlight is assembled and installed back.
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If you want to know even more interesting things, then you should definitely read about how to easily solve the condensation problemif the windows “cry” regularly.
A source: https://novate.ru/blogs/220120/53173/